A Jewish man is waiting in line to be knighted by the Queen of
England. He is supposed to kneel and recite a sentence in Latin.
When it comes his turn, the Queen taps him on the shoulders with the
sword -- and in the panic of excitement he forgets the Latin
line. Thinking quickly, he recites the only other line he knows in a
foreign language which he remembers from the Passover Seder: "Mah
nishtana ha-lailah ha-zeh mi-kol ha-leilot."
The puzzled Queen turns to her advisor and asks, "Why is this knight
different from all other knights?"